<!DOCTYPE html>
<html>

<head>
    <title>test ckeditor</title>
    <meta charset="utf-8" />
</head>

<body>
    <textarea id="test"></textarea>
</body>
<script type="text/javascript" src="https://ckeditor.com/themes/ckeditor4/vendor/ckeditor/4.7.2/ckeditor.js?ovqzns"></script>
<script type="text/javascript">
	CKEDITOR.replace( 'test' );
</script>
</html>